Cornell University Library · Nabu Press
| title | ISBN-13 (ISBN-10) | year of publication | 
|---|---|---|
| An Introduction to the History of Science | 978-1-143-05637-6 (1-143-05637-X) | 2010 | 
| An Introduction to the History of Science | 978-1-4297-6627-2 (1-4297-6627-1) | 2009 | 
| The History of Medicine in Its Salient Features | 978-1-4297-6711-8 (1-4297-6711-1) | 2009 | 
W.L. · Walter Leaf · Walter Leupi · Walter Levy · Walter Lipp · Walter Loeb · Walter Loub · Walter Lupo